Page 2 - International Safety Symbols; WARNING
MA250-EU-EN-V3.2-6/11 2 Introduction Congratulations on your purchase of this Extech MA250 Clamp Meter. This meter measures AC Current, AC/DC Voltage, Resistance, Capacitance, Frequency, Diode Test, Duty Cycle and Continuity. Special features include Thermocouple Temperature and Non-Contact Voltage ...
Page 3 - Function Maximum
MA250-EU-EN-V3.2-6/11 3 SAFETY NOTES • Do not exceed the maximum allowable input range of any function. • Do not apply voltage to meter when resistance function is selected. • Set the function switch OFF when the meter is not in use. • Remove the battery if meter is to be stored for longer than 60 d...
Page 4 - Description; Meter Description
MA250-EU-EN-V3.2-6/11 4 Description Meter Description 1. Current clamp 2. NCV LED indicator 3. Clamp opening trigger 4. MODE button 5. HZ/% button 6. LCD Display 7. Negative input jack 8. Non-Contact Voltage Detector 9. HOLD button 10. Function Switch 11. Relative Button 12. Battery compartment (rea...
Page 5 - Operation; NOTES; Non-Contact Voltage Detector; NOTE; AC Current Measurements
MA250-EU-EN-V3.2-6/11 5 Operation NOTES : Read and understand all Warning and Caution statements in this operation manual prior to using this meter. Set the function select switch to the OFF position when the meter is not in use. Non-Contact Voltage Detector WARNING: Risk of Electrocution. Before us...
Page 6 - Resistance, Diode, Continuity Measurements
MA250-EU-EN-V3.2-6/11 6 AC/DC Voltage, Frequency, Duty Cycle Measurements CAUTION: Do not measure voltages if a motor on the circuit is being switched ON or OFF. Large voltage surges may occur that can damage the meter. 1. Rotate the function switch to the V position. 2. Press the MODE button to sel...
Page 7 - Capacitance Measurements; CAP; Type K Temperature Measurements; °F or °C
MA250-EU-EN-V3.2-6/11 7 Capacitance Measurements WARNING: To avoid electric shock, discharge the capacitor before measuring. 1. Rotate the function switch to the CAP capacitance position. 2. Insert the black test lead banana plug into the negative COM jack. Insert the red test lead banana plug into ...
Page 9 - Maintenance; Cleaning and Storage; EU Battery ordinance; disposal in the household garbage is prohibited!
MA250-EU-EN-V3.2-6/11 9 Maintenance WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter with an open case. Cleaning and Storage Periodically wipe the case w...
Page 10 - Specifications
MA250-EU-EN-V3.2-6/11 10 Specifications Function Range Resolution Accuracy (% of reading + digits) 20.00 AAC 0.01A ±(2.5% + 8 digits) AC Current 50/60Hz 200.0 AAC 0.1A ±(2.8% + 8 digits) 4.000 VAC 0.001V 40.00 VAC 0.01V 400.0 VAC 0.1V ±(1.8% + 8 digits) AC Voltage 50 to 400Hz 600 VAC 1V ±(2.5% + 8 d...